update version to 1.4.0a3

[otzi5300]

Text to release note:

ModelSkill 1.4.0a3

• Dropped Python 3.10 support; minimum version is now Python 3.11
• Vertical skill – Profile-based skill assessment (VerticalObservation, VerticalModelResult, SkillProfile) (Vertical skill #585)
• Network: Reach observations – Extract and compare data along reaches (renamed from "edge") (Extracting data directly from reach #637, Rename edge to reach throughout network extension #642)
• Network: Node/reach subsets – Filter network model results to specific nodes and reaches (Selecting network subsets #625)
• Fix pandas 3.0 compatibility (Fix pandas 3.0 compatibility #561)

[otzi5300]

Inactivate the CI with group network due to:

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Why mikeio1d works but modelskill doesn't: Both runners have .NET 8 AND .NET 10 installed. Pythonnet by default "rolls forward" and picks the highest available runtime (.NET 10). In mikeio1d's CI, it works because the hatch build hook copies native binaries correctly during source install. In modelskill, mikeio1d is installed from PyPI and the ufs.so native lib isn't found when .NET 10 is the active runtime.

The fix: DOTNET_ROLL_FORWARD: LatestPatch tells .NET to stay on the major version it was built for (8.x) and not jump to 10. This matches how the native ufs.so was compiled.

This is the same pattern used when .NET apps need to run against a specific runtime version.

[ecomodeller]